Cleanup.

* eshell/em-unix.el (top): Require 'esh-opt and 'pcomplete.
(eshell/su, eshell/sudo): Require 'tramp.  Fix problems reading
arguments.  Expand `default-directory'.

* net/tramp.el (tramp-handle-file-remote-p): Expand FILENAME for
the benefit of returning an expanded localname.
(tramp-tramp-file-p): Handle the case NAME is not a string.

lisp/ChangeLog

@@ -1,3 +1,14 @@
+2009-12-03  Michael Albinus  <michael.albinus@gmx.de>
+
+	Cleanup.
+	* eshell/em-unix.el (top): Require 'esh-opt and 'pcomplete.
+	(eshell/su, eshell/sudo): Require 'tramp.  Fix problems reading
+	arguments.  Expand `default-directory'.
+
+	* net/tramp.el (tramp-handle-file-remote-p): Expand FILENAME for
+	the benefit of returning an expanded localname.
+	(tramp-tramp-file-p): Handle the case NAME is not a string.
+
 2009-12-03  Dan Nicolaescu  <dann@ics.uci.edu>
 
 	Add support for bzr shelve/unshelve.

lisp/eshell/em-unix.el

@@ -37,6 +37,8 @@
 ;;; Code:
 
 (require 'eshell)
+(require 'esh-opt)
+(require 'pcomplete)
 
 ;;;###autoload
 (eshell-defgroup eshell-unix nil
@@ -1048,10 +1050,11 @@ Show wall-clock time elapsed during execution of COMMAND.")
 
 (defun eshell/su (&rest args)
   "Alias \"su\" to call Tramp."
+  (require 'tramp)
   (setq args (eshell-stringify-list (eshell-flatten-list args)))
-  (let (login)
+  (let ((orig-args (copy-tree args)))
     (eshell-eval-using-options
-     "sudo" args
+     "su" args
      '((?h "help" nil nil "show this usage screen")
        (?l "login" nil login "provide a login environment")
        (?  nil nil login "provide a login environment")
@@ -1062,13 +1065,18 @@ Become another USER during a login session.")
 		  (host (or (file-remote-p default-directory 'host)
 			    "localhost"))
 		  (dir (or (file-remote-p default-directory 'localname)
-			   default-directory)))
+			   (expand-file-name default-directory))))
 	      (eshell-for arg args
 		(if (string-equal arg "-") (setq login t) (setq user arg)))
+	      ;; `eshell-eval-using-options' does not handle "-".
+	      (if (member "-" orig-args) (setq login t))
 	      (if login (setq dir "~/"))
 	      (if (and (file-remote-p default-directory)
-		       (not (string-equal
-			     user (file-remote-p default-directory 'user))))
+		       (or
+			(not (string-equal
+			      "su" (file-remote-p default-directory 'method)))
+			(not (string-equal
+			      user (file-remote-p default-directory 'user)))))
 		  (add-to-list
 		   'tramp-default-proxies-alist
 		   (list host user (file-remote-p default-directory))))
@@ -1079,8 +1087,9 @@ Become another USER during a login session.")
 
 (defun eshell/sudo (&rest args)
   "Alias \"sudo\" to call Tramp."
+  (require 'tramp)
   (setq args (eshell-stringify-list (eshell-flatten-list args)))
-  (let (user)
+  (let ((orig-args (copy-tree args)))
     (eshell-eval-using-options
      "sudo" args
      '((?h "help" nil nil "show this usage screen")
@@ -1089,19 +1098,26 @@ Become another USER during a login session.")
        :usage "[(-u | --user) USER] COMMAND
 Execute a COMMAND as the superuser or another USER.")
      (throw 'eshell-external
-	    (let* ((user (or user "root"))
-		   (host (or (file-remote-p default-directory 'host)
-			     "localhost"))
-		   (dir (or (file-remote-p default-directory 'localname)
-			    default-directory)))
+	    (let ((user (or user "root"))
+		  (host (or (file-remote-p default-directory 'host)
+			    "localhost"))
+		  (dir (or (file-remote-p default-directory 'localname)
+			   (expand-file-name default-directory))))
+	      ;; `eshell-eval-using-options' reads options of COMMAND.
+	      (while (and (stringp (car orig-args))
+			  (member (car orig-args) '("-u" "--user")))
+		(setq orig-args (cddr orig-args)))
 	      (if (and (file-remote-p default-directory)
-		       (not (string-equal
-			     user (file-remote-p default-directory 'user))))
+		       (or
+			(not (string-equal
+			      "sudo" (file-remote-p default-directory 'method)))
+			(not (string-equal
+			      user (file-remote-p default-directory 'user)))))
 		  (add-to-list
 		   'tramp-default-proxies-alist
 		   (list host user (file-remote-p default-directory))))
 	      (let ((default-directory (format "/sudo:%s@%s:%s" user host dir)))
-		(eshell-named-command (car args) (cdr args))))))))
+		(eshell-named-command (car orig-args) (cdr orig-args))))))))
 
 (put 'eshell/sudo 'eshell-no-numeric-conversions t)
 

lisp/net/tramp.el

@@ -4629,7 +4629,7 @@ Lisp error raised when PROGRAM is nil is trapped also, returning 1."
 (defun tramp-handle-file-remote-p (filename &optional identification connected)
   "Like `file-remote-p' for Tramp files."
   (when (tramp-tramp-file-p filename)
-    (with-parsed-tramp-file-name filename nil
+    (with-parsed-tramp-file-name (expand-file-name filename) nil
       (and (or (not connected)
 	       (let ((p (tramp-get-connection-process v)))
 		 (and p (processp p) (memq (process-status p) '(run open)))))
@@ -7709,9 +7709,9 @@ Not actually used.  Use `(format \"%o\" i)' instead?"
 	   (string-to-number (match-string 2 host))))))
 
 (defun tramp-tramp-file-p (name)
-  "Return t if NAME is a Tramp file."
+  "Return t if NAME is a string with Tramp file name syntax."
   (save-match-data
-    (string-match tramp-file-name-regexp name)))
+    (and (stringp name) (string-match tramp-file-name-regexp name))))
 
 (defun tramp-find-method (method user host)
   "Return the right method string to use.